| 7584629 |
Separation of a substance mixture consisting of hydrogen chloride and phosgene |
Martin Sohn, Eckhard Stroefer, Filip Nevejans, Ulrich Penzel, Hans-Juergen Pallasch +3 more |
2009-09-08 |
| 7524405 |
Method for separating out solvent from a reaction mixture resulting from an isocyanate synthesis and for purifying this solvent |
Martin Sohn, Eckhard Stroefer, Filip Nevejans, Ulrich Penzel, Hans-Juergen Pallasch +3 more |
2009-04-28 |
| 7408083 |
Method for the production of diaminodiarylmethanes |
Ulrich Steinbrenner, Eckhard Stroefer, Martin Sohn, Veronika Quaschning, Helmut Moehwald +3 more |
2008-08-05 |
| 7230130 |
Process for preparing methylenedianiline and methylenebis (phenylisocyanate) |
Eckhard Ströfer, Wilfried Seyfert, Hans Volkmar Schwarz, Olaf Schweers, Volker Scharr +1 more |
2007-06-12 |
| 6916953 |
Integrated process for preparing isocyanates |
Christian Walsdorff, Martin Fiene, Eckhard Ströfer, Klaus Harth, Filip Deberdt |
2005-07-12 |
| 6831192 |
Process for preparing methylenedianiline and methylenebis(phenyl isocyanate) |
Eckhard Ströfer, Wilfried Seyfert, Hans Volkmar Schwarz, Olaf Schweers, Volker Scharr +1 more |
2004-12-14 |
| 6576788 |
METHOD FOR PRODUCING MIXTURES CONSISTING OF DIPHENYLMETHANE DIISOCYANATES AND POLYPHENYLENE-POLYMETHYLENE-POLYISOCYANATES CONTAINING A REDUCED AMOUNT OF CHLORINATED SECONDARY PRODUCTS AND WITH A REDUCED IODINE COLOR INDEX |
Ulrich Penzel, Volker Scharr, Dieter Starosta, Hilmar Boesel, Eckhard Ströfer +8 more |
2003-06-10 |
| 6433219 |
Method for the production of methylenedi(phenylamine and methylenedi(phenyl isocyanate) |
Eckhard Ströfer, Wilfried Seyfert, Hans Volkmar Schwarz, Olaf Schweers, Volker Scharr +1 more |
2002-08-13 |
